1
|
Di Francesco D, Pigliafreddo A, Casarella S, Di Nunno L, Mantovani D, Boccafoschi F. Biological Materials for Tissue-Engineered Vascular Grafts: Overview of Recent Advancements. Biomolecules 2023; 13:1389. [PMID: 37759789 PMCID: PMC10526356 DOI: 10.3390/biom13091389] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
The clinical demand for tissue-engineered vascular grafts is still rising, and there are many challenges that need to be overcome, in particular, to obtain functional small-diameter grafts. The many advances made in cell culture, biomaterials, manufacturing techniques, and tissue engineering methods have led to various promising solutions for vascular graft production, with available options able to recapitulate both biological and mechanical properties of native blood vessels. Due to the rising interest in materials with bioactive potentials, materials from natural sources have also recently gained more attention for vascular tissue engineering, and new strategies have been developed to solve the disadvantages related to their use. In this review, the progress made in tissue-engineered vascular graft production is discussed. We highlight, in particular, the use of natural materials as scaffolds for vascular tissue engineering.
Collapse
Affiliation(s)
- Dalila Di Francesco
- Department of Health Sciences, University of Piemonte Orientale “A. Avogadro”, 28100 Novara, Italy; (D.D.F.); (S.C.); (L.D.N.)
- Laboratory for Biomaterials and Bioengineering, CRC-I, Department of Min-Met-Materials Engineering, University Hospital Research Center, Regenerative Medicine, Laval University, Quebec City, QC G1V 0A6, Canada;
| | - Alexa Pigliafreddo
- Department of Health Sciences, University of Piemonte Orientale “A. Avogadro”, 28100 Novara, Italy; (D.D.F.); (S.C.); (L.D.N.)
| | - Simona Casarella
- Department of Health Sciences, University of Piemonte Orientale “A. Avogadro”, 28100 Novara, Italy; (D.D.F.); (S.C.); (L.D.N.)
| | - Luca Di Nunno
- Department of Health Sciences, University of Piemonte Orientale “A. Avogadro”, 28100 Novara, Italy; (D.D.F.); (S.C.); (L.D.N.)
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering, CRC-I, Department of Min-Met-Materials Engineering, University Hospital Research Center, Regenerative Medicine, Laval University, Quebec City, QC G1V 0A6, Canada;
| | - Francesca Boccafoschi
- Department of Health Sciences, University of Piemonte Orientale “A. Avogadro”, 28100 Novara, Italy; (D.D.F.); (S.C.); (L.D.N.)
| |
Collapse
|
2
|
Jia W, Liu L, Li M, Zhou Y, Zhou H, Weng H, Gu G, Xiao M, Chen Z. Construction of enzyme-laden vascular scaffolds based on hyaluronic acid oligosaccharides-modified collagen nanofibers for antithrombosis and in-situ endothelialization of tissue-engineered blood vessels. Acta Biomater 2022; 153:287-298. [PMID: 36155095 DOI: 10.1016/j.actbio.2022.09.041] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 09/14/2022] [Accepted: 09/15/2022] [Indexed: 11/29/2022]
Abstract
The current use of synthetic grafts often yields low patency in the reconstruction of small-diameter blood vessels owing to the deposition of thrombi and imperfect coverage of the endothelium on the graft lumen. Therefore, the design of vascular scaffolds with antithrombotic performance and endothelialization is greatly required. Herein, we developed an enzyme-laden scaffold based on hyaluronic acid oligosaccharides-modified collagen nanofibers (labeled HA-COL) to improve the anti-platelet capacity and endothelialization of vascular grafts. In this study, HA-COL nanofibers not only encouraged the endothelialization of vascular scaffolds, but acted as an antiplatelet enzyme-laden platform. Apyrase (Apy) and 5'-nucleotidase (5'-NT) were covalently grafted onto the nanofibers, which in turn converted the platelet-sensitive substance: adenosine diphosphate (ADP) into adenosine monophosphate (AMP) and adenosine, thereby, improving the antithrombotic performance of the scaffolds. Notably, the catalytic end-product: adenosine would work in coordination with HA-COL to synergistically enhance the endothelialization of the vascular scaffolds. The results demonstrated that the enzyme-laden scaffolds maintained catalytic performance, reduced platelet adhesion and aggregation, and guaranteed higher patency after 1-month in situ transplantation. Moreover, these scaffolds showed optimal cytocompatibility, tissue compatibility, scaffold biodegradability and tissue regenerative capability during in vivo implantation. Overall, these engineered vascular scaffolds demonstrated their capacity for endothelialization and antithrombotic performance, suggesting their potential for small-diameter vascular tissue engineering applications. STATEMENT OF SIGNIFICANCE: Considering the critical problems in small-diameter vascular reconstruction, the enzyme-laden vascular scaffolds were prepared for improving in-situ endothelialization and antithrombotic performances of artificial blood vessels. The electrospun HA-COL nanofibers were used as the main matrix materials, which provided favorable structural templates for the regeneration of vasculature and functioned as a platform for the loading of enzymes. The enzyme-laden scaffolds with the biomimetic cascading reaction would convert ADP into adenosine, thereby, decreasing the sensitivity of platelets and improving the antithrombotic performance of tissue-engineered blood vessels (TEBVs). The nanofibrous scaffolds exhibited optimal cytocompatibility, tissue compatibility and regenerative capability, working together with catalytic products of dual-enzyme reaction that would synergistically contribute to TEBVs endothelialization. This study provides a new method for the improvement of in-situ endothelialization of small-diameter TEBVs while qualified with antithrombotic performance.
Collapse
Affiliation(s)
- Weibin Jia
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China; Hong Kong Centre for Cerebro-Cardiovascular Health Engineering, Hong Kong 999077, China
| | - Liling Liu
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Min Li
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Yuanmeng Zhou
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Hang Zhou
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Hongjuan Weng
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Guofeng Gu
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Min Xiao
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China
| | - Zonggang Chen
- National Glycoengineering Research Center and Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Qingdao, 266237, China.
| |
Collapse
|
3
|
Wertheimer S, Sharabi M, Shelah O, Lesman A, Haj-Ali R. Bio-composites reinforced with unique coral collagen fibers: Towards biomimetic-based small diameter vascular grafts. J Mech Behav Biomed Mater 2021; 119:104526. [PMID: 33894525 DOI: 10.1016/j.jmbbm.2021.104526] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 03/15/2021] [Accepted: 04/09/2021] [Indexed: 01/01/2023]
Abstract
Cardiovascular Diseases (CVDs) are the leading cause of death worldwide. Approximately 31% of all global deaths are caused by CVDs, of which 42% are attributable to coronary artery disease (CAD). CAD is characterized by a narrowing of arteries that restricts the normal blood flow. Over time, surgical intervention is required in severe cases of occlusions and includes implantation of autologous vessels. Today synthetic grafts are used successfully as replacements for blood vessels with a diameter larger than 6 mm. However, they often fail as small-diameter blood vessel replacements. This study introduces a new biocomposite material system consisting of unique and long (cm-scale) collagen fibers derived from soft corals embedded within an alginate hydrogel matrix. The new biocomposite layers were used to fabricate grafts, towards developing a new class of tissue-engineered small-diameter blood vessels. These constructs consisted of both circumferentially and longitudinally oriented collagen fibers. The mechanical properties of the grafts were investigated via a new experimental setup constructed in our lab for this purpose, which applied internal pressure levels of 0-300 mmHg. Similar to native coronary arteries, the biocomposite tubes demonstrated a compliance of 4.88 ± 0.99%/100 mmHg for a physiologic pressure range of 80-120 mmHg. Furthermore, a numerical finite element simulation model is proposed to generate the overall mechanical response of the construct. It is composed of axial and circumferential fibers embedded within the continuum alginate elements. Good prediction is demonstrated when compared with the measured pressure-strain response. Moreover, we examined biocompatibility and cell growth on the collagen fibers. Fibroblast cells proliferated during the experiment that lasted for 32 days and showed aligned configuration with the collagen fiber orientation. The novelty of this study is manifested in the use of naturally derived coral-based long collagen fibers for the development of a new class of tissue-engineered grafts. The proposed novel biocomposite graft demonstrated both mechanical and biological compatibility and can be further developed for small-diameter blood-vessel replacement.
Collapse
Affiliation(s)
- Shir Wertheimer
- The Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Mirit Sharabi
- The Faculty of Engineering, Ariel University, Ariel, 407000, Israel
| | - Ortal Shelah
- The Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Ayelet Lesman
- The Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Rami Haj-Ali
- The Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv, 69978, Israel.
| |
Collapse
|
4
|
Saito J, Yokoyama U, Nakamura T, Kanaya T, Ueno T, Naito Y, Takayama T, Kaneko M, Miyagawa S, Sawa Y, Ishikawa Y. Scaffold-free tissue-engineered arterial grafts derived from human skeletal myoblasts. Artif Organs 2021; 45:919-932. [PMID: 33539557 DOI: 10.1111/aor.13930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/16/2021] [Accepted: 01/28/2021] [Indexed: 12/11/2022]
Abstract
Tissue-engineered vascular grafts (TEVGs) are in urgent demand for both adult and pediatric patients. Although several approaches have utilized vascular smooth muscle cells (SMCs) and endothelial cells as cell sources for TEVGs, these cell sources have a limited proliferative capacity that results in an inability to reconstitute neotissues. Skeletal myoblasts are attractive cell sources as they possess high proliferative capacity, and they are already being tested in clinical trials for patients with ischemic cardiomyopathy. Our previous study demonstrated that periodic hydrostatic pressurization (PHP) promoted fibronectin fibrillogenesis in vascular SMCs, and that PHP-induced extracellular matrix (ECM) arrangements enabled the fabrication of implantable arterial grafts derived from SMCs without using a scaffold material. We assessed the molecular response of human skeletal myoblasts to PHP exposure, and aimed to fabricate arterial grafts from the myoblasts by exposure to PHP. To examine the PHP-response genes, human skeletal myoblasts were subjected to bulk RNA-sequencing after PHP exposure. Gene-set enrichment analysis revealed significant positive correlations between PHP exposure and vascular development-related genes. Real-time polymerase chain reaction (RT-PCR) demonstrated that PHP significantly upregulated collagen and elastic fiber formation-related gene expression, such as fibronectin, lysyl oxidase, collagen type I α1, collagen type IV α1, and tropoelastin. Based on these findings showing the potential role of PHP in vessel formation, we fabricated arterial grafts by repeated cell seeding and exposure to PHP every 24 hours. The resultant 15-layered myoblast grafts had high collagen content, which provided a tensile rupture strength of 899 ± 104 mm Hg. Human skeletal myoblast grafts were implanted as patch grafts in the aorta of immunosuppressed rats and found to be endothelialized and completely patent until the endpoint of 60 postoperative days. Implanted human myoblasts were gradually replaced by host-derived cells, which successfully formed vascular neotissues with layered elastic fibers. These findings suggest that human skeletal myoblasts have the potential to be a feasible cell source for scaffold-free implantable arterial grafts under PHP culture conditions.
Collapse
Affiliation(s)
- Junichi Saito
- Department of Physiology, Tokyo Medical University, Tokyo, Japan.,Cardiovascular Research Institute, Yokohama City University, Yokohama, Japan
| | - Utako Yokoyama
- Department of Physiology, Tokyo Medical University, Tokyo, Japan.,Cardiovascular Research Institute, Yokohama City University, Yokohama, Japan
| | - Takashi Nakamura
- Cardiovascular Research Institute, Yokohama City University, Yokohama, Japan
| | - Tomomitsu Kanaya
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Takayoshi Ueno
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yuji Naito
- Department of Physiology, Tokyo Medical University, Tokyo, Japan
| | - Toshio Takayama
- Department of Mechanical Engineering, Tokyo Institute of Technology, Tokyo, Japan
| | - Makoto Kaneko
- Graduate School of Science and Engineering, Meijo University, Nagoya, Japan
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yoshiki Sawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yoshihiro Ishikawa
- Cardiovascular Research Institute, Yokohama City University, Yokohama, Japan
| |
Collapse
|
5
|
Kimicata M, Swamykumar P, Fisher JP. Extracellular Matrix for Small-Diameter Vascular Grafts. Tissue Eng Part A 2020; 26:1388-1401. [PMID: 33231135 PMCID: PMC7759287 DOI: 10.1089/ten.tea.2020.0201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/11/2020] [Indexed: 01/15/2023] Open
Abstract
To treat coronary heart disease, coronary artery bypass grafts are used to divert blood flow around blockages in the coronary arteries. Autologous grafts are the gold standard of care, but they are characterized by their lack of availability, low quality, and high failure rates. Alternatively, tissue-engineered small-diameter vascular grafts made from synthetic or natural polymers have not demonstrated adequate results to replace autologous grafts; synthetic grafts result in a loss of patency due to thrombosis and intimal hyperplasia, whereas scaffolds from natural polymers are generally unable to support the physiological conditions. Extracellular matrix (ECM) from a variety of sources, including cell-derived, 2D, and cannular tissues, has become an increasingly useful tool for this application. The current review examines the ECM-based methods that have recently been investigated in the field and comments on their viability for clinical applications.
Collapse
Affiliation(s)
- Megan Kimicata
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland, USA
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
| | - Prateek Swamykumar
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| | - John P. Fisher
- Center for Engineering Complex Tissues, and University of Maryland, College Park, Maryland, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| |
Collapse
|
6
|
Jeong HJ, Nam H, Jang J, Lee SJ. 3D Bioprinting Strategies for the Regeneration of Functional Tubular Tissues and Organs. Bioengineering (Basel) 2020; 7:E32. [PMID: 32244491 PMCID: PMC7357036 DOI: 10.3390/bioengineering7020032] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/30/2020] [Accepted: 03/30/2020] [Indexed: 01/01/2023] Open
Abstract
It is difficult to fabricate tubular-shaped tissues and organs (e.g., trachea, blood vessel, and esophagus tissue) with traditional biofabrication techniques (e.g., electrospinning, cell-sheet engineering, and mold-casting) because these have complicated multiple processes. In addition, the tubular-shaped tissues and organs have their own design with target-specific mechanical and biological properties. Therefore, the customized geometrical and physiological environment is required as one of the most critical factors for functional tissue regeneration. 3D bioprinting technology has been receiving attention for the fabrication of patient-tailored and complex-shaped free-form architecture with high reproducibility and versatility. Printable biocomposite inks that can facilitate to build tissue constructs with polymeric frameworks and biochemical microenvironmental cues are also being actively developed for the reconstruction of functional tissue. In this review, we delineated the state-of-the-art of 3D bioprinting techniques specifically for tubular tissue and organ regeneration. In addition, this review described biocomposite inks, such as natural and synthetic polymers. Several described engineering approaches using 3D bioprinting techniques and biocomposite inks may offer beneficial characteristics for the physiological mimicry of human tubular tissues and organs.
Collapse
Affiliation(s)
- Hun-Jin Jeong
- Department of Mechanical Engineering, Wonkwang University, 460, Iksan-daero, Iksan-si, Jeollabuk-do 54538, Korea;
| | - Hyoryung Nam
- Department of Creative IT Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea;
| | - Jinah Jang
- Department of Creative IT Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea;
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Korea
- Institute of Convergence Science, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Seung-Jae Lee
- Department of Mechanical Engineering, Wonkwang University, 460, Iksan-daero, Iksan-si, Jeollabuk-do 54538, Korea;
- Department of Mechanical and Design Engineering, Wonkwang University, 460, Iksan-daero, Iksan-si, Jeollabuk-do 54538, Korea
| |
Collapse
|
7
|
Akentjew TL, Terraza C, Suazo C, Maksimcuka J, Wilkens CA, Vargas F, Zavala G, Ocaña M, Enrione J, García-Herrera CM, Valenzuela LM, Blaker JJ, Khoury M, Acevedo JP. Rapid fabrication of reinforced and cell-laden vascular grafts structurally inspired by human coronary arteries. Nat Commun 2019; 10:3098. [PMID: 31308369 PMCID: PMC6629634 DOI: 10.1038/s41467-019-11090-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 06/20/2019] [Indexed: 12/19/2022] Open
Abstract
Design strategies for small diameter vascular grafts are converging toward native-inspired tissue engineered grafts. A new automated technology is presented that combines a dip-spinning methodology for depositioning concentric cell-laden hydrogel layers, with an adapted solution blow spinning (SBS) device for intercalated placement of aligned reinforcement nanofibres. This additive manufacture approach allows the assembly of bio-inspired structural configurations of concentric cell patterns with fibres at specific angles and wavy arrangements. The middle and outer layers were tuned to structurally mimic the media and adventitia layers of native arteries, enabling the fabrication of small bore grafts that exhibit the J-shape mechanical response and compliance of human coronary arteries. This scalable automated system can fabricate cellularized multilayer grafts within 30 min. Grafts were evaluated by hemocompatibility studies and a preliminary in vivo carotid rabbit model. The dip-spinning-SBS technology generates constructs with native mechanical properties and cell-derived biological activities, critical for clinical bypass applications.
Collapse
Affiliation(s)
- Tamara L Akentjew
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
- Consorcio Regenero, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna 4860, Macul, Santiago, 7820436, Chile
| | - Claudia Terraza
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Cristian Suazo
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Jekaterina Maksimcuka
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK
| | - Camila A Wilkens
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
- Consorcio Regenero, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Francisco Vargas
- Departamento de Cirugía Vascular y Endovascular, Pontificia Universidad Católica de Chile, Avda. Libertador Bernando O'Higgins 340, Santiago, 8331150, Chile
| | - Gabriela Zavala
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Macarena Ocaña
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Javier Enrione
- Biopolymer Research and Engineering Lab (BiopREL), School of Nutrition and Dietetics, Faculty of Medicine, Universidad de los Andes, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Claudio M García-Herrera
- Departmento de Ingeniería Mecánica, Universidad de Santiago de Chile, Avda. Libertador Bernando O'Higgins 3363, Estación Central, Santiago, 9170022, Chile
| | - Loreto M Valenzuela
- Department of Chemical and Bioprocess Engineering, School of Engineering, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna 4860, Macul, Santiago, 7820436, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Libertador Bernando O'Higgins 340, Macul, Santiago, 7820436, Chile
- Center of Nanotechnology Research and Advanced Materials "CIEN -UC", Pontificia Universidad Católica de Chile, Avda. Libertador Bernando O'Higgins 340, Macul, Santiago, 7820436, Chile
| | - Jonny J Blaker
- Bio-Active Materials Group, School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK
| | - Maroun Khoury
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
- Consorcio Regenero, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile
| | - Juan Pablo Acevedo
- Laboratory of Nano-Regenerative Medicine, Faculty of Medicine, Universidad de los Andes, San Carlos de Apoquindo 2200, Las Condes, Santiago, 7620001, Chile.
- Cells for Cells, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile.
- Consorcio Regenero, Avda. Plaza 2501, Las Condes, Santiago, 7620157, Chile.
| |
Collapse
|
8
|
Copes F, Pien N, Van Vlierberghe S, Boccafoschi F, Mantovani D. Collagen-Based Tissue Engineering Strategies for Vascular Medicine. Front Bioeng Biotechnol 2019; 7:166. [PMID: 31355194 PMCID: PMC6639767 DOI: 10.3389/fbioe.2019.00166] [Citation(s) in RCA: 96] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 06/24/2019] [Indexed: 12/21/2022] Open
Abstract
Cardiovascular diseases (CVDs) account for the 31% of total death per year, making them the first cause of death in the world. Atherosclerosis is at the root of the most life-threatening CVDs. Vascular bypass/replacement surgery is the primary therapy for patients with atherosclerosis. The use of polymeric grafts for this application is still burdened by high-rate failure, mostly caused by thrombosis and neointima hyperplasia at the implantation site. As a solution for these problems, the fast re-establishment of a functional endothelial cell (EC) layer has been proposed, representing a strategy of crucial importance to reduce these adverse outcomes. Implant modifications using molecules and growth factors with the aim of speeding up the re-endothelialization process has been proposed over the last years. Collagen, by virtue of several favorable properties, has been widely studied for its application in vascular graft enrichment, mainly as a coating for vascular graft luminal surface and as a drug delivery system for the release of pro-endothelialization factors. Collagen coatings provide receptor-ligand binding sites for ECs on the graft surface and, at the same time, act as biological sealants, effectively reducing graft porosity. The development of collagen-based drug delivery systems, in which small-molecule and protein-based drugs are immobilized within a collagen scaffold in order to control their release for biomedical applications, has been widely explored. These systems help in protecting the biological activity of the loaded molecules while slowing their diffusion from collagen scaffolds, providing optimal effects on the targeted vascular cells. Moreover, collagen-based vascular tissue engineering substitutes, despite not showing yet optimal mechanical properties for their use in the therapy, have shown a high potential as physiologically relevant models for the study of cardiovascular therapeutic drugs and diseases. In this review, the current state of the art about the use of collagen-based strategies, mainly as a coating material for the functionalization of vascular graft luminal surface, as a drug delivery system for the release of pro-endothelialization factors, and as physiologically relevant in vitro vascular models, and the future trend in this field of research will be presented and discussed.
Collapse
Affiliation(s)
- Francesco Copes
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering & Regenerative Medicine, CHU de Quebec Research Center, Laval University, Quebec City, QC, Canada
- Laboratory of Human Anatomy, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Nele Pien
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering & Regenerative Medicine, CHU de Quebec Research Center, Laval University, Quebec City, QC, Canada
- Polymer Chemistry & Biomaterials Group, Department of Organic and Macromolecular Chemistry, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Sandra Van Vlierberghe
- Polymer Chemistry & Biomaterials Group, Department of Organic and Macromolecular Chemistry, Centre of Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Francesca Boccafoschi
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering & Regenerative Medicine, CHU de Quebec Research Center, Laval University, Quebec City, QC, Canada
- Laboratory of Human Anatomy, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering & Regenerative Medicine, CHU de Quebec Research Center, Laval University, Quebec City, QC, Canada
| |
Collapse
|
9
|
Copes F, Chevallier P, Loy C, Pezzoli D, Boccafoschi F, Mantovani D. Heparin-Modified Collagen Gels for Controlled Release of Pleiotrophin: Potential for Vascular Applications. Front Bioeng Biotechnol 2019; 7:74. [PMID: 31024906 PMCID: PMC6465514 DOI: 10.3389/fbioe.2019.00074] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/18/2019] [Indexed: 01/14/2023] Open
Abstract
A fast re-endothelialization, along with the inhibition of neointima hyperplasia, are crucial to reduce the failure of vascular bypass grafts. Implants modifications with molecules capable of speeding up the re-endothelialization process have been proposed over the last years. However, clinical trials of angiogenic factor delivery have been mostly disappointing, underscoring the need to investigate a wider array of angiogenic factors. In this work, a drug release system based on a type I collagen hydrogel has been proposed for the controlled release of Pleiotrophin (PTN), a cytokine known for its pro-angiogenetic effects. Heparin, in virtue of its ability to sequester, protect and release growth factors, has been used to better control the release of PTN. Performances of the PTN drug delivery system on endothelial (ECs) and smooth muscle cells (SMCs) have been investigated. Structural characterization (mechanical tests and immunofluorescent analyses of the collagen fibers) was performed on the gels to assess if heparin caused changes in their mechanical behavior. The release of PTN from the different gel formulations has been analyzed using a PTN-specific ELISA assay. Cell viability was evaluated with the Alamar Blue Cell Viability Assay on cells directly seeded on the gels (direct test) and on cells incubated with supernatant, containing the released PTN, obtained from the gels (indirect test). The effects of the different gels on the migration of both ECs and SMCs have been evaluated using a Transwell migration assay. Hemocompatibility of the gel has been assessed with a clotting/hemolysis test. Structural analyses showed that heparin did not change the structural behavior of the collagen gels. ELISA quantification demonstrated that heparin induced a constant release of PTN over time compared to other conditions. Both direct and indirect viability assays showed an increase in ECs viability while no effects were noted on SMCs. Cell migration results evidenced that the heparin/PTN-modified gels significantly increased ECs migration and decreased the SMCs one. Finally, heparin significantly increased the hemocompatibility of the collagen gels. In conclusion, the PTN-heparin-modified collagen here proposed can represent an added value for vascular medicine, able to ameliorate the biological performance, and integration of vascular grafts.
Collapse
Affiliation(s)
- Francesco Copes
- Laboratory of Human Anatomy, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy.,Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| | - Pascale Chevallier
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| | - Caroline Loy
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| | - Daniele Pezzoli
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| | - Francesca Boccafoschi
- Laboratory of Human Anatomy, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy.,Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair Tier I for the Innovation in Surgery, Department of Min-Met-Materials Engineering, CHU de Quebec Research Center, Laval University, Quebec, QC, Canada
| |
Collapse
|
10
|
Jin Y, Chai W, Huang Y. Fabrication of Stand-Alone Cell-Laden Collagen Vascular Network Scaffolds Using Fugitive Pattern-Based Printing-Then-Casting Approach. ACS APPLIED MATERIALS & INTERFACES 2018; 10:28361-28371. [PMID: 30048116 DOI: 10.1021/acsami.8b09177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Vascular networks are of great significance in tissue engineering and viewed as the first step to fabricate human tissues. Although various techniques have been investigated to create vascular and vascular-like networks, the fabrication of stand-alone pure collagen-based vascular constructs is still a challenge because of the poor extrudability, weak mechanical property, and long cross-linking time of pure collagen solutions. In this study, a fugitive pattern-based printing-then-casting approach is investigated. The proposed alginate-based fugitive ink has excellent mechanical strength (by adding Laponite nanoclay), printability (by adding Laponite nanoclay), and controllable gelation rate (by adding disodium hydrogen phosphate). Using this fugitive ink, complex vascular-like structures can be easily printed and cross-linked in Laponite EP bath as fugitive vascular tree patterns. Each fugitive vascular tree pattern is then embedded in a gelatin bath to make a gelatin mold with the tree patterns. With the help of sodium citrate, the fugitive vascular tree pattern is liquefied and removed to create the gelatin mold with vascular channels. Finally, a stand-alone collagen vascular network scaffold embedded with fibroblasts can be fabricated by casting the cell-laden collagen suspension into the gelatin mold and releasing it from the mold at 37 °C. The cell-related investigations indicate that the cells grow and spread well in the pure collagen vascular network scaffold. The proposed hybrid printing-then-casting approach also provides a feasible technology to fabricate with materials having low viscosity, long gelation time, and poor mechanical property.
Collapse
|
11
|
Fibronectin promotes elastin deposition, elasticity and mechanical strength in cellularised collagen-based scaffolds. Biomaterials 2018; 180:130-142. [PMID: 30036726 DOI: 10.1016/j.biomaterials.2018.07.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 12/21/2022]
Abstract
One of the tightest bottlenecks in vascular tissue engineering (vTE) is the lack of strength and elasticity of engineered vascular wall models caused by limited elastic fiber deposition. In this study, flat and tubular collagen gel-based scaffolds were cellularised with vascular smooth muscle cells (SMCs) and supplemented with human plasma fibronectin (FN), a known master organizer of several extracellular matrix (ECM) fiber systems. The consequences of FN on construct maturation was investigated in terms of geometrical contraction, viscoelastic mechanical properties and deposition of core elastic fiber proteins. FN was retained in the constructs and promoted deposition of elastin by SMCs as well as of several proteins required for elastogenesis such as fibrillin-1, lysyl oxidase, fibulin-4 and latent TGF-β binding protein-4. Notably, gel contraction, tensile equilibrium elastic modulus and elasticity were strongly improved in tubular engineered tissues, approaching the behaviour of native arteries. In conclusion, this study demonstrates that FN exerts pivotal roles in directing SMC-mediated remodeling of scaffolds toward the production of a physiological-like, elastin-containing ECM with excellent mechanical properties. The developed FN-supplemented systems are promising for tissue engineering applications where the generation of mature elastic tissue is desired and represent valuable advanced in vitro models to investigate elastogenesis.
Collapse
|
12
|
Camasão DB, Pezzoli D, Loy C, Kumra H, Levesque L, Reinhardt DP, Candiani G, Mantovani D. Increasing Cell Seeding Density Improves Elastin Expression and Mechanical Properties in Collagen Gel-Based Scaffolds Cellularized with Smooth Muscle Cells. Biotechnol J 2018; 14:e1700768. [PMID: 29802760 DOI: 10.1002/biot.201700768] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 04/23/2018] [Indexed: 01/04/2023]
Abstract
Vascular tissue engineering combines cells with scaffold materials in vitro aiming the development of physiologically relevant vascular models. For natural scaffolds such as collagen gels, where cells can be mixed with the material solution before gelation, cell seeding density is a key parameter that can affect extracellular matrix deposition and remodeling. Nonetheless, this parameter is often overlooked and densities sensitively lower than those of native tissues, are usually employed. Herein, the effect of seeding density on the maturation of tubular collagen gel-based scaffolds cellularized with smooth muscle cells is investigated. The compaction, the expression, and deposition of key vascular proteins and the resulting mechanical properties of the constructs are evaluated up to 1 week of maturation. Results show that increasing cell seeding density accelerates cell-mediated gel compaction, enhances elastin expression (more than sevenfold increase at the highest density, Day 7) and finally improves the overall mechanical properties of constructs. Of note, the tensile equilibrium elastic modulus, evaluated by stress-relaxation tests, reach values comparable to native arteries for the highest cell density, after a 7-day maturation. Altogether, these results show that higher cell seeding densities promote the rapid maturation of collagen gel-based vascular constructs toward structural and mechanical properties better mimicking native arteries.
Collapse
Affiliation(s)
- Dimitria B Camasão
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Québec, Division of Regenerative Medicine, Laval University, Québec, QC G1V 0A6, Canada
| | - Daniele Pezzoli
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Québec, Division of Regenerative Medicine, Laval University, Québec, QC G1V 0A6, Canada
| | - Caroline Loy
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Québec, Division of Regenerative Medicine, Laval University, Québec, QC G1V 0A6, Canada
| | - Heena Kumra
- Faculty of Medicine, Department of Anatomy and Cell Biology, McGill University, Montreal, QC, H3A 0C7, Canada.,Faculty of Dentistry, McGill University, Montreal, QC, H3A 0C7, Canada
| | - Lucie Levesque
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Québec, Division of Regenerative Medicine, Laval University, Québec, QC G1V 0A6, Canada
| | - Dieter P Reinhardt
- Faculty of Medicine, Department of Anatomy and Cell Biology, McGill University, Montreal, QC, H3A 0C7, Canada.,Faculty of Dentistry, McGill University, Montreal, QC, H3A 0C7, Canada
| | - Gabriele Candiani
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Milan 20131, Italy.,The Protein Factory Research Center, Politecnico di Milano and University of Insubria, Milan 20131, Italy
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met-Materials Engineering, Research Center of CHU de Québec, Division of Regenerative Medicine, Laval University, Québec, QC G1V 0A6, Canada
| |
Collapse
|
13
|
Carrabba M, Madeddu P. Current Strategies for the Manufacture of Small Size Tissue Engineering Vascular Grafts. Front Bioeng Biotechnol 2018; 6:41. [PMID: 29721495 PMCID: PMC5916236 DOI: 10.3389/fbioe.2018.00041] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/23/2018] [Indexed: 01/12/2023] Open
Abstract
Occlusive arterial disease, including coronary heart disease (CHD) and peripheral arterial disease (PAD), is the main cause of death, with an annual mortality incidence predicted to rise to 23.3 million worldwide by 2030. Current revascularization techniques consist of angioplasty, placement of a stent, or surgical bypass grafting. Autologous vessels, such as the saphenous vein and internal thoracic artery, represent the gold standard grafts for small-diameter vessels. However, they require invasive harvesting and are often unavailable. Synthetic vascular grafts represent an alternative to autologous vessels. These grafts have shown satisfactory long-term results for replacement of large- and medium-diameter arteries, such as the carotid or common femoral artery, but have poor patency rates when applied to small-diameter vessels, such as coronary arteries and arteries below the knee. Considering the limitations of current vascular bypass conduits, a tissue-engineered vascular graft (TEVG) with the ability to grow, remodel, and repair in vivo presents a potential solution for the future of vascular surgery. Here, we review the different methods that research groups have been investigating to create TEVGs in the last decades. We focus on the techniques employed in the manufacturing process of the grafts and categorize the approaches as scaffold-based (synthetic, natural, or hybrid) or self-assembled (cell-sheet, microtissue aggregation and bioprinting). Moreover, we highlight the attempts made so far to translate this new strategy from the bench to the bedside.
Collapse
Affiliation(s)
- Michele Carrabba
- School of Clinical Sciences, Bristol Heart Institute, University of Bristol, Bristol, United Kingdom
| | - Paolo Madeddu
- School of Clinical Sciences, Bristol Heart Institute, University of Bristol, Bristol, United Kingdom
| |
Collapse
|
14
|
Prediction of circumferential compliance and burst strength of polymeric vascular grafts. J Mech Behav Biomed Mater 2018; 79:332-340. [DOI: 10.1016/j.jmbbm.2017.12.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/21/2017] [Accepted: 12/29/2017] [Indexed: 11/18/2022]
|
15
|
Seifu DG, Meghezi S, Unsworth L, Mequanint K, Mantovani D. Viscoelastic properties of multi-layered cellularized vascular tissues fabricated from collagen gel. J Mech Behav Biomed Mater 2018; 80:155-163. [PMID: 29427931 DOI: 10.1016/j.jmbbm.2018.01.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/11/2017] [Accepted: 01/20/2018] [Indexed: 01/31/2023]
Abstract
Since collagen is one of the major extracellular matrix components in vascular tissues, its use for vascular tissue engineering has several advantages. However, collagen extraction and processing for tissue engineering application alters its structure. As a result, collagen-based vascular constructs show poor mechanical properties compared to native tissues. In this work, multi-layer (single, double, and triple) vascular tissue constructs were engineered from porcine smooth muscle cells (PSMCs) entrapped in collagen gel by concentrically and sequentially layering after compaction of the previous layer(s). The engineered tissues were matured for either 14 or 21 days to allow the collagen gel to remodel before viscoelasticity, compliance, histological, and protein expression studies were conducted. While there was no significant difference upon addition of the different layers on the elastic modulus (p > .05), the viscous modulus of the single layer construct was significantly lower than the double and triple layer constructs (p < .05). Increasing the number of layers of the cellularized collagen construct increased the wall thickness and the viscous modulus of the construct. Furthermore, the cellularized single-layer construct had a relatively high compliance, but the double and triple layer constructs had compliance values comparable to both engineered vessels and native vessels. PSMCs were uniformly distributed throughout the cross-section and expressed the anticipated marker proteins smooth muscle-α actin, calponin, and smooth muscle myosin heavy chain. Taken together, this study demonstrated the viscoelastic responsiveness of multi-layer collagen-gel based vascular tissues.
Collapse
Affiliation(s)
- Dawit G Seifu
- Dept. of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec City, Canada
| | - Sébastien Meghezi
- Dept. of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec City, Canada
| | - Larry Unsworth
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Canada
| | - Kibret Mequanint
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada; Biomedical Engineering Graduate Program, The University of Western Ontario, London, Ontario, Canada.
| | - Diego Mantovani
- Dept. of Min-Met-Materials Engineering & CHU de Quebec Research Center, Laval University, Quebec City, Canada.
| |
Collapse
|
16
|
Loy C, Pezzoli D, Candiani G, Mantovani D. A Cost-Effective Culture System for the In Vitro Assembly, Maturation, and Stimulation of Advanced Multilayered Multiculture Tubular Tissue Models. Biotechnol J 2017; 13. [DOI: 10.1002/biot.201700359] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/24/2017] [Indexed: 01/25/2023]
Affiliation(s)
- Caroline Loy
- Laboratory for Biomaterials and Bioengineering; Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery; Division of Regenerative Medicine; Department of Min-Met-Materials Engineering; Research Center of CHU de Québec; Laval University; PLT-1745G Québec City QC Canada G1V 0A6
| | - Daniele Pezzoli
- Laboratory for Biomaterials and Bioengineering; Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery; Division of Regenerative Medicine; Department of Min-Met-Materials Engineering; Research Center of CHU de Québec; Laval University; PLT-1745G Québec City QC Canada G1V 0A6
| | - Gabriele Candiani
- Department of Chemistry; Materials and Chemical Engineering “Giulio Natta”; Politecnico di Milano; Milan Italy
- The Protein Factory Research Center; Politecnico of Milano and University of Insubria; Milan Italy
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering; Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery; Division of Regenerative Medicine; Department of Min-Met-Materials Engineering; Research Center of CHU de Québec; Laval University; PLT-1745G Québec City QC Canada G1V 0A6
| |
Collapse
|
17
|
Loy C, Meghezi S, Lévesque L, Pezzoli D, Kumra H, Reinhardt D, Kizhakkedathu JN, Mantovani D. A planar model of the vessel wall from cellularized-collagen scaffolds: focus on cell–matrix interactions in mono-, bi- and tri-culture models. Biomater Sci 2017; 5:153-162. [DOI: 10.1039/c6bm00643d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An easy to prepare and manipulate model of the vascular wall in a planar shape to investigate physiological and pathological processes of vascular tissues.
Collapse
Affiliation(s)
- Caroline Loy
- Laboratory for Biomaterials and Bioengineering
- Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery
- Department of Min-Met-Materials Engineering
- Research Center of CHU de Quebec
- Division of Regenerative Medicine
| | - Sébastien Meghezi
- Laboratory for Biomaterials and Bioengineering
- Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery
- Department of Min-Met-Materials Engineering
- Research Center of CHU de Quebec
- Division of Regenerative Medicine
| | - Lucie Lévesque
- Laboratory for Biomaterials and Bioengineering
- Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery
- Department of Min-Met-Materials Engineering
- Research Center of CHU de Quebec
- Division of Regenerative Medicine
| | - Daniele Pezzoli
- Laboratory for Biomaterials and Bioengineering
- Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery
- Department of Min-Met-Materials Engineering
- Research Center of CHU de Quebec
- Division of Regenerative Medicine
| | - Heena Kumra
- Faculty of Medicine
- Department of Anatomy and Cell Biology
- and Faculty of Dentistry McGill University
- Montréal
- Canada H3A 0C7
| | - Dieter Reinhardt
- Faculty of Medicine
- Department of Anatomy and Cell Biology
- and Faculty of Dentistry McGill University
- Montréal
- Canada H3A 0C7
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research
- Department of Pathology and Laboratory Medicine
- Department of Chemistry
- University of British Columbia
- Vancouver
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering
- Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery
- Department of Min-Met-Materials Engineering
- Research Center of CHU de Quebec
- Division of Regenerative Medicine
| |
Collapse
|
18
|
Loy C, Lainé A, Mantovani D. Rotation-based technique for the rapid densification of tubular collagen gel scaffolds. Biotechnol J 2016; 11:1673-1679. [DOI: 10.1002/biot.201600268] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 10/07/2016] [Accepted: 10/11/2016] [Indexed: 12/21/2022]
Affiliation(s)
- Caroline Loy
- Laboratory for Biomaterials & Bioengineering, CRC-1, Department of Mines-Metallurgy-Materials Engineering & the CHU de Québec Research Center; Laval University; Québec, QC Canada
| | - Audrey Lainé
- Laboratory for Biomaterials & Bioengineering, CRC-1, Department of Mines-Metallurgy-Materials Engineering & the CHU de Québec Research Center; Laval University; Québec, QC Canada
| | - Diego Mantovani
- Laboratory for Biomaterials & Bioengineering, CRC-1, Department of Mines-Metallurgy-Materials Engineering & the CHU de Québec Research Center; Laval University; Québec, QC Canada
| |
Collapse
|
19
|
Gao Y, Yi T, Shinoka T, Lee YU, Reneker DH, Breuer CK, Becker ML. Pilot Mouse Study of 1 mm Inner Diameter (ID) Vascular Graft Using Electrospun Poly(ester urea) Nanofibers. Adv Healthc Mater 2016; 5:2427-36. [PMID: 27390286 PMCID: PMC5951289 DOI: 10.1002/adhm.201600400] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 05/30/2016] [Indexed: 12/13/2022]
Abstract
An off-the-shelf, small diameter tissue engineered vascular graft (TEVG) would be transformative to surgeons in multiple subspecialties. Herein, the results of a small diameter (ID ≈ 1 mm) vascular graft constructed from resorbable, amino acid-based poly(ester urea) (PEU) are reported. Electrospun PEU grafts of two different wall thicknesses (type A: 250 μm; type B: 350 μm) are implanted as abdominal infra-renal aortic grafts in a severe combined immune deficient/beige mouse model and evaluated for vessel remodeling over one year. Significantly, the small diameter TEVG does not rupture or lead to acute thrombogenic events during the intervals tested. The pilot TEVG in vivo shows long-term patency and extensive tissue remodeling with type A grafts. Extensive tissue remodeling in type A grafts leads to the development of well-circumscribed neovessels with an endothelial inner lining, a neointima containing smooth muscle cells. However, due to slow degradation of the PEU scaffold materials in vivo, the grafts remain after one year. The type B grafts, which have 350 μm thick walls, experience occlusion over the one year interval due to intimal hyperplasia. This study affords significant findings that will guide the design of future generations of small diameter vascular grafts.
Collapse
Affiliation(s)
- Yaohua Gao
- Department of Polymer Science, The University of Akron, Akron, OH, 44325, USA
| | - Tai Yi
- Department of Surgery, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Toshiharu Shinoka
- Department of Surgery, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Yong Ung Lee
- Department of Surgery, Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Darrell H Reneker
- Department of Polymer Science, The University of Akron, Akron, OH, 44325, USA
| | | | - Matthew L Becker
- Department of Polymer Science, The University of Akron, Akron, OH, 44325, USA.
| |
Collapse
|
20
|
Abstract
Cardiovascular tissue engineering offers the promise of biologically based repair of injured and damaged blood vessels, valves, and cardiac tissue. Major advances in cardiovascular tissue engineering over the past few years involve improved methods to promote the establishment and differentiation of induced pluripotent stem cells (iPSCs), scaffolds from decellularized tissue that may produce more highly differentiated tissues and advance clinical translation, improved methods to promote vascularization, and novel
in vitro microphysiological systems to model normal and diseased tissue function. iPSC technology holds great promise, but robust methods are needed to further promote differentiation. Differentiation can be further enhanced with chemical, electrical, or mechanical stimuli.
Collapse
Affiliation(s)
- George A Truskey
- Department of Biochemical Engineering, Duke University, Durham, NC, USA
| |
Collapse
|
21
|
Fernandez CE, Yen RW, Perez SM, Bedell HW, Povsic TJ, Reichert WM, Truskey GA. Human Vascular Microphysiological System for in vitro Drug Screening. Sci Rep 2016; 6:21579. [PMID: 26888719 PMCID: PMC4757887 DOI: 10.1038/srep21579] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 01/27/2016] [Indexed: 01/03/2023] Open
Abstract
In vitro human tissue engineered human blood vessels (TEBV) that exhibit vasoactivity can be used to test human toxicity of pharmaceutical drug candidates prior to pre-clinical animal studies. TEBVs with 400–800 μM diameters were made by embedding human neonatal dermal fibroblasts or human bone marrow-derived mesenchymal stem cells in dense collagen gel. TEBVs were mechanically strong enough to allow endothelialization and perfusion at physiological shear stresses within 3 hours after fabrication. After 1 week of perfusion, TEBVs exhibited endothelial release of nitric oxide, phenylephrine-induced vasoconstriction, and acetylcholine-induced vasodilation, all of which were maintained up to 5 weeks in culture. Vasodilation was blocked with the addition of the nitric oxide synthase inhibitor L-NG-Nitroarginine methyl ester (L-NAME). TEBVs elicited reversible activation to acute inflammatory stimulation by TNF-α which had a transient effect upon acetylcholine-induced relaxation, and exhibited dose-dependent vasodilation in response to caffeine and theophylline. Treatment of TEBVs with 1 μM lovastatin for three days prior to addition of Tumor necrosis factor – α (TNF-α) blocked the injury response and maintained vasodilation. These results indicate the potential to develop a rapidly-producible, endothelialized TEBV for microphysiological systems capable of producing physiological responses to both pharmaceutical and immunological stimuli.
Collapse
Affiliation(s)
- C E Fernandez
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| | - R W Yen
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| | - S M Perez
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| | - H W Bedell
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| | - T J Povsic
- Duke Clinical Research Institute, Duke University Medical Center, Durham, NC 27708
| | - W M Reichert
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| | - G A Truskey
- Department of Biomedical Engineering, Duke University, Durham, NC 27708
| |
Collapse
|
22
|
Pashneh-Tala S, MacNeil S, Claeyssens F. The Tissue-Engineered Vascular Graft-Past, Present, and Future. TISSUE ENGINEERING PART B-REVIEWS 2015; 22:68-100. [PMID: 26447530 PMCID: PMC4753638 DOI: 10.1089/ten.teb.2015.0100] [Citation(s) in RCA: 451] [Impact Index Per Article: 50.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cardiovascular disease is the leading cause of death worldwide, with this trend predicted to continue for the foreseeable future. Common disorders are associated with the stenosis or occlusion of blood vessels. The preferred treatment for the long-term revascularization of occluded vessels is surgery utilizing vascular grafts, such as coronary artery bypass grafting and peripheral artery bypass grafting. Currently, autologous vessels such as the saphenous vein and internal thoracic artery represent the gold standard grafts for small-diameter vessels (<6 mm), outperforming synthetic alternatives. However, these vessels are of limited availability, require invasive harvest, and are often unsuitable for use. To address this, the development of a tissue-engineered vascular graft (TEVG) has been rigorously pursued. This article reviews the current state of the art of TEVGs. The various approaches being explored to generate TEVGs are described, including scaffold-based methods (using synthetic and natural polymers), the use of decellularized natural matrices, and tissue self-assembly processes, with the results of various in vivo studies, including clinical trials, highlighted. A discussion of the key areas for further investigation, including graft cell source, mechanical properties, hemodynamics, integration, and assessment in animal models, is then presented.
Collapse
Affiliation(s)
- Samand Pashneh-Tala
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
| | - Sheila MacNeil
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
| | - Frederik Claeyssens
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield , Broad Lane, Sheffield, United Kingdom
| |
Collapse
|
23
|
Abstract
An ideal vascular substitute, especially in <6 mm diameter applications, is a major clinical essentiality in blood vessel replacement surgery. Blood vessels are structurally complex and functionally dynamic tissue, with minimal regeneration potential. These have composite extracellular matrix (ECM) and arrangement. The interplay between ECM components and tissue specific cells gives blood vessels their specialized functional attributes. The core of vascular tissue engineering and regeneration relies on the challenges in creating vascular conduits that match native vessels and adequately regenerate in vivo. Out of numerous vascular regeneration concerns, the relevance of ECM emphasizes much attention toward appropriate choice of scaffold material and further scaffold development strategies. The review is intended to be focused on the various approaches of scaffold materials currently in use in vascular regeneration and current state of the art. Scaffold of choice in vascular tissue engineering ranges from natural to synthetic, decellularized, and even scaffold free approach. The applicability of tubular scaffold for in vivo vascular regeneration is under active investigation. A patent conduit with an ample endothelial luminal layer that can regenerate in vivo remains an unanswered query in the field of small diameter vascular tissue engineering. Besides, scaffolds developed for vascular regeneration, should aim at providing functional substitutes for use in a regenerative approach from the laboratory bench to patient bedside.
Collapse
Affiliation(s)
- Neelima Thottappillil
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| |
Collapse
|
24
|
Finosh GT, Jayabalan M. Hybrid amphiphilic bimodal hydrogels having mechanical and biological recognition characteristics for cardiac tissue engineering. RSC Adv 2015. [DOI: 10.1039/c5ra04448k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Tissue engineering strategies rely on the favourable microniche scaffolds for 3D cell growth.
Collapse
Affiliation(s)
- G. T. Finosh
- Sree Chitra Tirunal Institute for Medical Sciences and Technology
- Polymer Science Division
- Thiruvananthapuram-695 012
- India
| | - M. Jayabalan
- Sree Chitra Tirunal Institute for Medical Sciences and Technology
- Polymer Science Division
- Thiruvananthapuram-695 012
- India
| |
Collapse
|
25
|
Abstract
Vascular occlusion remains the leading cause of death in Western countries, despite advances made in balloon angioplasty and conventional surgical intervention. Vascular surgery, such as CABG surgery, arteriovenous shunts, and the treatment of congenital anomalies of the coronary artery and pulmonary tracts, requires biologically responsive vascular substitutes. Autografts, particularly saphenous vein and internal mammary artery, are the gold-standard grafts used to treat vascular occlusions. Prosthetic grafts have been developed as alternatives to autografts, but their low patency owing to short-term and intermediate-term thrombosis still limits their clinical application. Advances in vascular tissue engineering technology-such as self-assembling cell sheets, as well as scaffold-guided and decellularized-matrix approaches-promise to produce responsive, living conduits with properties similar to those of native tissue. Over the past decade, vascular tissue engineering has become one of the fastest-growing areas of research, and is now showing some success in the clinic.
Collapse
Affiliation(s)
- Dawit G Seifu
- Laboratory for Biomaterials and Bioengineering, Department of Min-Met-Materials Engineering and Quebec University Hospital Center, Laval University, Quebec City, QC G1V 0A6, Canada
| | | | | | | |
Collapse
|
26
|
Effects of a pseudophysiological environment on the elastic and viscoelastic properties of collagen gels. Int J Biomater 2012; 2012:319290. [PMID: 22844285 PMCID: PMC3403400 DOI: 10.1155/2012/319290] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 05/02/2012] [Indexed: 01/04/2023] Open
Abstract
Vascular tissue engineering focuses on the replacement of diseased small-diameter blood vessels with a diameter less than 6 mm for which adequate substitutes still do not exist. One approach to vascular tissue engineering is to culture vascular cells on a scaffold in a bioreactor. The bioreactor establishes pseudophysiological conditions for culture (medium culture, 37°C, mechanical stimulation). Collagen gels are widely used as scaffolds for tissue regeneration due to their biological properties; however, they exhibit low mechanical properties. Mechanical characterization of these scaffolds requires establishing the conditions of testing in regard to the conditions set in the bioreactor. The effects of different parameters used during mechanical testing on the collagen gels were evaluated in terms of mechanical and viscoelastic properties. Thus, a factorial experiment was adopted, and three relevant factors were considered: temperature (23°C or 37°C), hydration (aqueous saline solution or air), and mechanical preconditioning (with or without). Statistical analyses showed significant effects of these factors on the mechanical properties which were assessed by tensile tests as well as stress relaxation tests. The last tests provide a more consistent understanding of the gels' viscoelastic properties. Therefore, performing mechanical analyses on hydrogels requires setting an adequate environment in terms of temperature and aqueous saline solution as well as choosing the adequate test.
Collapse
|
27
|
Park IS, Kim SH, Kim YH, Kim IH, Kim SH. A Collagen/Smooth Muscle Cell-Incorporated Elastic Scaffold for Tissue-Engineered Vascular Grafts. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:1645-60. [DOI: 10.1163/156856208x386237] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- In Su Park
- a Biomaterials Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea; School of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - Sang-Heon Kim
- b Biomaterials Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea
| | - Young Ha Kim
- c Department of Materials Science & Engineering, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-ku, Gwangju 500-712, South Korea
| | - Ik Hwan Kim
- d School of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - Soo Hyun Kim
- e Biomaterials Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 130-650, South Korea
| |
Collapse
|
28
|
Wang X, Sui S. Pulsatile Culture of a Poly(DL-Lactic-Co-Glycolic Acid) Sandwiched Cell/Hydrogel Construct Fabricated Using a Step-by-Step Mold/Extraction Method. Artif Organs 2011; 35:645-55. [DOI: 10.1111/j.1525-1594.2010.01137.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
29
|
Van Vlierberghe S, Dubruel P, Schacht E. Biopolymer-based hydrogels as scaffolds for tissue engineering applications: a review. Biomacromolecules 2011; 12:1387-408. [PMID: 21388145 DOI: 10.1021/bm200083n] [Citation(s) in RCA: 1079] [Impact Index Per Article: 83.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Hydrogels are physically or chemically cross-linked polymer networks that are able to absorb large amounts of water. They can be classified into different categories depending on various parameters including the preparation method, the charge, and the mechanical and structural characteristics. The present review aims to give an overview of hydrogels based on natural polymers and their various applications in the field of tissue engineering. In a first part, relevant parameters describing different hydrogel properties and the strategies applied to finetune these characteristics will be described. In a second part, an important class of biopolymers that possess thermosensitive properties (UCST or LCST behavior) will be discussed. Another part of the review will be devoted to the application of cryogels. Finally, the most relevant biopolymer-based hydrogel systems, the different methods of preparation, as well as an in depth overview of the applications in the field of tissue engineering will be given.
Collapse
Affiliation(s)
- S Van Vlierberghe
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Ghent, Belgium
| | | | | |
Collapse
|
30
|
Boccafoschi F, Bosetti M, Mosca C, Mantovani D, Cannas M. The role of shear stress on mechanically stimulated engineered vascular substitutes: influence on mechanical and biological properties. J Tissue Eng Regen Med 2011; 6:60-7. [DOI: 10.1002/term.398] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2010] [Accepted: 11/11/2010] [Indexed: 01/12/2023]
|
31
|
Tailoring Mechanical Properties of Collagen-Based Scaffolds for Vascular Tissue Engineering: The Effects of pH, Temperature and Ionic Strength on Gelation. Polymers (Basel) 2010. [DOI: 10.3390/polym2040664] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
|
32
|
Marelli B, Alessandrino A, Farè S, Freddi G, Mantovani D, Tanzi MC. Compliant electrospun silk fibroin tubes for small vessel bypass grafting. Acta Biomater 2010; 6:4019-26. [PMID: 20466080 DOI: 10.1016/j.actbio.2010.05.008] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 04/07/2010] [Accepted: 05/06/2010] [Indexed: 11/18/2022]
Abstract
Processing silk fibroin (SF) by electrospinning offers a very attractive opportunity for producing three-dimensional nanofibrillar matrices in tubular form, which may be useful for a biomimetic approach to small calibre vessel regeneration. Bypass grafting of small calibre vessels, with a diameter less than 6mm, is performed mainly using autografts, like the saphenous vein or internal mammary artery. At present no polymeric grafts made of SF are commercially available, mainly due to inadequate properties (low compliance and lack of endothelium cells). The aim of this work was to electrospin SF into tubular structures (Ø=6mm) for small calibre vessel grafting, characterize the morphological, chemico-physical and mechanical properties of the electrospun SF structures and to validate their potential to interact with cells. The morphological properties of electrospun SF nanofibres were investigated by scanning electron microscopy. Chemico-physical analyses revealed an increase in the crystallinity of the structure of SF nanofibres on methanol treatment. Mechanical tests, i.e. compliance and burst pressure measurements, of the electrospun SF tubes showed that the inner pressure to radial deformation ratio was linear for elongation up to 15% and pressure up to 400 mm Hg. The mean compliance value between 80 and 120 mm Hg was higher than the values reported for both Goretex(R) and Dacron(R) grafts and for bovine heterografts, but still slightly lower than those of saphenous and umbilical vein, which nowadays represent the gold standard for the replacement of small calibre arteries. The electrospun tubes resisted up to 575+/-17 mmHg, which is more than four times the upper physiological pressure of 120 mmHg and more than twice the pathological upper pressures (range 180-220 mmHg). The in vitro tests showed a good cytocompatibility of the electrospun SF tubes. Therefore, the electrospun SF tubes developed within this work represent a suitable candidate for small calibre blood vessel replacement.
Collapse
|
33
|
Achilli M, Lagueux J, Mantovani D. On the effects of UV-C and pH on the mechanical behavior, molecular conformation and cell viability of collagen-based scaffold for vascular tissue engineering. Macromol Biosci 2010; 10:307-16. [PMID: 19946859 DOI: 10.1002/mabi.200900248] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Collagen-based vascular substitutes represent in VTE a valid alternative for the replacement of diseased small-calibre blood vessels. In this study, collagen gel-based scaffolds were crosslinked combining modulation of pH and UV-C radiation. The effects on the mechanical properties, on the molecular structure and on cell viability and morphology were investigated. The mechanical response increased as a function of pH or UV-C dose and strongly depended on the test speed. Collagen molecular conformation resulted only slightly modified. While cell adhesion was not significantly altered, cell proliferation partially decreased in function of pH and UV-C. These findings suggest that UV-C treated collagen gels can represent an adequate substrate for VTE applications.
Collapse
Affiliation(s)
- Matteo Achilli
- Laboratory for Biomaterials and Bioengineering, Department of Materials Engineering & Research Center, Quebec University Hospital, Laval University, Quebec City, G1K 7P4, Canada
| | | | | |
Collapse
|
34
|
Hadjizadeh A, Mohebbi-Kalhori D. Porous hollow membrane sheet for tissue engineering applications. J Biomed Mater Res A 2010; 93:1140-50. [PMID: 19768796 DOI: 10.1002/jbm.a.32608] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In spite of the present advances in the scaffolds fabrication and bioreactor systems, the ability to create functional thick tissue masses in vitro is still a great tissue engineering challenge. To overcome this problem, the fabrication of a capillary bed, for nutrient supply to and waste product removal from the tissue engineering construct as it grows, is essential. However, the technical construction of a capillary-like architecture is complex and challenging. This study reports, for the very first time, a simple method to design and fabricate a porous hollow membrane sheet (PHMsh) to provide both a capillary bed and a scaffold to support tissue growth. The PHMsh composed of a flexible porous sheet involving parallel porous channels and can be used as flat-, rolled-, or sandwiched-shape scaffold. The PHMsh was fabricated from poly(epsilon-caprolactone) polymer solution using solvent casting methods (i.e., immersion precipitation and air casting). Optical microscopy and scanning electron microscopy were used for the morphological analyses. The PHMsh was surface treated using n-hepthylamine plasma polymer (HApp) and X-ray photoelectron spectroscopy confirmed successful surface coating. Human umbilical vein endothelial cells (HUVECs) and fibroblast cells were used to evaluate the capability of PHMsh toward cell adhesion. The HApp coating enhanced both HUVEC and fibroblast cells adhesion. The obtained preliminary results demonstrated the successful fabrication of the PHMsh, with potential application for tissue engineering scaffolds, particularly in large tissue mass generation under perfusion systems in vitro, which is our future research direction.
Collapse
Affiliation(s)
- Afra Hadjizadeh
- Department of Chemical Engineering and Biotechnology, University of Sherbrooke, 2500 University Boulevard, Sherbrooke, Québec, Canada J1K 2R1.
| | | |
Collapse
|
35
|
Zorlutuna P, Elsheikh A, Hasirci V. Nanopatterning of collagen scaffolds improve the mechanical properties of tissue engineered vascular grafts. Biomacromolecules 2010; 10:814-21. [PMID: 19226102 DOI: 10.1021/bm801307y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tissue engineered constructs with cells growing in an organized manner have been shown to have improved mechanical properties. This can be especially important when constructing tissues that need to perform under load, such as cardiac and vascular tissue. Enhancement of mechanical properties of tissue engineered vascular grafts via orientation of smooth muscle cells by the help of topographical cues have not been reported yet. In the present study, collagen scaffolds with 650, 500, and 332.5 nm wide nanochannels and ridges were designed and seeded with smooth muscle cells isolated from the human saphenous vein. Cell alignment on the construct was shown by SEM and fluorescence microscopy. The ultimate tensile strength (UTS) and Young's modulus of the scaffolds were determined after 45 and 75 days. Alamar Blue assay was used to determine the number of viable cells on surfaces with different dimensioned patterns. Presence of nanopatterns increased the UTS from 0.55 +/- 0.11 to as much as 1.63 +/- 0.46 MPa, a value within the range of natural arteries and veins. Similarly, Young's modulus values were found to be around 4 MPa, again in the range of natural vessels. The study thus showed that nanopatterns as small as 332.5 nm could align the smooth muscle cells and that alignment significantly improved mechanical properties, indicating that nanopatterned collagen scaffolds have the potential for use in the tissue engineering of small diameter blood vessels.
Collapse
Affiliation(s)
- P Zorlutuna
- METU, BIOMAT, Department of Biotechnology, Biotechnology Research Unit, Ankara, Turkey
| | | | | |
Collapse
|
36
|
Rajan N, Lagueux J, Couet F, Pennock W, Mantovani D, Sionkowska A. Low doses of ultraviolet radiation stimulate cell activity in collagen-based scaffolds. Biotechnol Prog 2009; 24:884-9. [PMID: 19194897 DOI: 10.1002/btpr.3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Cardiovascular diseases are increasingly becoming the main cause of death all over the world, leading to an increase in the economical and social burden. Vascular tissue engineering (VTE) is paving its routes toward challenging applications, focused mainly on substitutions of small-diameter blood vessels (<6 mm). Native collagen, a natural biological material which possesses extraordinary properties in terms of biocompatibility, has been extensively investigated as a scaffold for VTE. However, collagen is mainly extracted from collagen-rich native natural tissues by different harsh chemical and physical treatments, resulting in a solution susceptible to be processed for the fabrication of supports. These treatments imply the destruction of the native organization of the collagen microstructure, thus resulting in a collagen-based support less resistant in terms of mechanical properties than the native one. Therefore, different approaches have been investigated to increase these mechanical properties. Although UV irradiation present a strong potential for efficient crosslinking collagen macromolecules, the undesirable effects of UV on cell activity still remain the main challenge to be overpassed. The aim of this study was to investigate the potential of UV radiation and glycation for the crosslinking of collagen gels, with particular concern to the cells and capacity of the cells to remodel the collagen structure.
Collapse
Affiliation(s)
- Navneeta Rajan
- Laboratory for Biomaterials and Bioengineering, Dept. of Materials Engineering and Research Centre, Quebec University Hospital, Laval University, Québec City, Canada
| | | | | | | | | | | |
Collapse
|
37
|
Zorlutuna P, Hasirci N, Hasirci V. Nanopatterned collagen tubes for vascular tissue engineering. J Tissue Eng Regen Med 2008; 2:373-7. [DOI: 10.1002/term.99] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|